/*
 * Copyright (C) 2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package vip.justlive.easyproxy.core.httpproxy;

import java.nio.ByteBuffer;
import vip.justlive.easyproxy.core.context.Config;
import vip.justlive.oxygen.core.net.aio.core.AioHandler;
import vip.justlive.oxygen.core.net.aio.core.AioListener;
import vip.justlive.oxygen.core.net.aio.core.ChannelContext;

/**
 * http代理客户端处理
 *
 * @author wubo
 */
public class HttpClientHandler implements AioHandler, AioListener {

  @Override
  public ByteBuffer encode(Object data, ChannelContext channelContext) {
    return ByteBuffer.wrap((byte[]) data);
  }

  @Override
  public Object decode(ByteBuffer buffer, int readableSize, ChannelContext channelContext) {
    byte[] data = new byte[readableSize];
    buffer.get(data);
    return data;
  }

  @Override
  public void handle(Object data, ChannelContext channelContext) {
    ChannelContext remote = (ChannelContext) channelContext.getAttr(Config.REMOTE);
    if (remote == null) {
      channelContext.close();
      return;
    }
    remote.write(data);
  }

  @Override
  public void onClosed(ChannelContext channelContext) {
    ChannelContext remote = (ChannelContext) channelContext.getAttr(Config.REMOTE);
    if (remote != null) {
      remote.close();
    }
  }
}
